Builders participating in the EfficiencyCrafted Homes program use advanced construction practices, design details, and materials proven to meet a higher standard of energy performance. The result is a home that delivers comfort and energy savings that you can enjoy from the day you move in. The builders listed are not agents or representatives of Columbia Gas of Ohio and Columbia Gas does not guarantee or warranty the work of the listed builders. The list of builders is provided as a convenience only. Final builder selection is entirely at your discretion.